On Sep 11 12:48:40, MERIGHI Marcus wrote:
> Hello,
>
> I did a complete deletion of all partitions of an external usb hd by
> means of diskmgmt.msc under windows, followed by partitioning and
> formating to msdos fat32 with kind help of acronis true image since
> windows xp does not do such things natively.
>
> Very unexpectedly (to me) under OpenBSD the fdisk output (see below)
> reflects the new layout, but disklabel output (see below) shows the old
> partition size.
What "old size"?
You repartitioned the disk under windows.
So now it has no real BSD label. What does
disklabel do with such disks? The sensible thing:
Note that when a disk has no real BSD disklabel, the kernel creates
a default label so that the disk can be used. This default label will
include other partitions found on the disk if they are supported on
your architecture. For example, on systems that support fdisk(8)
partitions the default label will also include DOS and Linux
partitions.
And that's exactly what happened:
> Disk: sd1 geometry: 91201/255/63 [1465149168 Sectors]
> Offset: 0 Signature: 0xAA55
> Starting Ending LBA Info:
> #: id C H S - C H S [ start: size ]
> -------------------------------------------------------------------------------
> *0: 0C 0 32 33 - 91201 52 51 [ 2048: 1465145344 ] Win95
> FAT32L
> 1: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
>
> 2: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
>
> 3: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
>
disklabel recognized the fdisk DOS partition
and created a default disklabel for that:
> # /dev/rsd1c:
> type: SCSI
> disk: SCSI disk
> label: holmer-medien-01
> duid: 94f3e0ef639263f9
> flags:
> bytes/sector: 512
> sectors/track: 63
> tracks/cylinder: 255
> sectors/cylinder: 16065
> cylinders: 91201
> total sectors: 1465149168
> boundstart: 0
> boundend: 1465149168
> drivedata: 0
>
> 16 partitions:
> # size offset fstype [fsize bsize cpg]
> c: 1465149168 0 unused
> i: 1048576000 2048 MSDOS #
